romney will vote in boston in an unusual move, he will fly to cleveland and pittsburgh to make a final appeal to working-class voters. >> vice president biden cast his ballot in delaware where he just voted with his wife. just like everybody else, the vice president stood in line for about 20 minutes, chatting it up with other voters. last night he made final pleas in virginia. >> national polls still tight, outcome of the presidential race is more likely to turn on which states each candidate wins, rather than the total popular vote. katie marzullo joins that story. >> reporter: this is the electoral map. we are going to have fun, do some . battleground states in yellow, you can see how the electoral votes stack up. let's say we give barack obama ohio, florida as well. he still is coming up five electoral votes shy of the 270 he's going to need that leaves him with nevada or iowa, at least new hampshire with four votes is not going do it. let's give mitt romney ohio and florida as well. he's quite a bit short still, 29. he's going to need any combination of the yellow states that are